Long-term Follow-up of the Use of a Synthetic Bone Graft Composite in the Surgical Management of Primary Bone Tumors.

The surgical management of benign and benign aggressive bone tumors typically involves intralesional curettage and reconstruction of the resulting defect with cement or bone graft material. At the authors' institution, an injectable synthetic calcium sulfate-calcium phosphate composite is now the standard graft material for these cases. This study reports the long-term follow-up, specifically the stability of bone regeneration, for the use of the synthetic graft material for oncologic reconstruction. Fourteen patients who underwent intralesional curettage of a primary bone tumor followed by cavitary reconstruction with synthetic graft material who had at least 4-year follow-up were identified from an institutional orthopedic oncology database. Clinical outcome data, focusing on long-term clinical and radiographic features of the reconstruction, were extracted from electronic and paper medical records. Seven females and 7 males were included (mean age at surgery, 28.1 years; range, 13-64 years). Follow-up ranged from 50 to 105 months (mean, 68 months). Most surgical reconstructions were done for the lower limb (n= 11), and giant cell tumor of bone was the most common tumor treated. The mean amount of synthetic graft material used was 18.6 cm(3). Complete radiographic resorption and new bone incorporation was observed within the first year, and bone remodeling was complete in all patients. Bone remodeling remained stable throughout the longer-term followup (ie, up to 9 years). The use of an injectable synthetic calcium sulfate-calcium phosphate composite is a viable option in the reconstruction of cavitary bone defects following intralesional curettage of primary benign bone tumors. This reconstruction technique was safe, with no long-term complications, and led to complete radiographic resorption and new bone incorporation with longlasting stability.